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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsEasy
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A newspaper seller sells (90) newspapers on the first day and (15) more newspapers each next day. How many newspapers are sold on the (7)th day?

Answer and explanation

Correct answer: 180

The daily sales form an AP with first term \(a=90\) and common difference \(d=15\). The 7th term is \(a_7=a+(7-1)d=90+6\times15=180\). Therefore, 180 is correct. Choosing 195 would correspond to adding the common difference one extra time. Exam tip: for the \(n\)th term, add the common difference \(n-1\) times.

Related tags

Arithmetic ProgressionAp Word ProblemsNth TermCommon DifferenceClass 10 MathematicsWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions Ap
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